Nutrient Acquisition

Question 1

Heterotroph

Answer 1

Organisms that use an ORGANIC carbon source

Question 2

Autotroph

Answer 2

Organisms that use an INORGANIC carbon source

Question 3

The primary plant cell wall contains what 3 things?

Answer 3

Cellulose, hemicellulose, and pectin

Question 4

The secondary plant cell wall contains what additional thing?

Answer 4

Lignin

Question 5

Cellulases

Answer 5

Hydrolyze cellulose to form cellobiose that can be taken up into the cell

Question 6

How does the crystalline region of cellulose affect hydrolysis?

Answer 6

Makes hydrolysis harder because it excludes water

Question 7

Exoenzymes

Answer 7

Exported enzymes

Question 8

Cellulosome

Answer 8

A large extra cellular multi protein complex of anaerobic bacteria that breaks down cellulose

Question 9

What are the 4 parts of the cellulosome?

Answer 9

Hydrolytic enzymes - hydrolases
Scaffolding proteins - scaffoldins
Docking proteins - dockerins
Cellulose binding proteins

Question 10

What are the 4 classes of transport systems

Answer 10

Simple transport - symporter such as lactose transport
Group translocation - PTS system
The ABC system - Pst and iron transport
TRAP

Question 11

TRAP transporters

Answer 11

Secondary active transport systems that rely on an ion gradient not ATP
Osmotic shock sensitive - PBP leaks out
Typically high affinity, high specificity